Add model card metadata

This PR ensures the model card is up-to-date by setting the relevant metadata.

This includes ensuring the model is discoverable via the question-answering tag and the link to the paper page is set.

README.md

@@ -1,11 +1,13 @@
 ---
-# For reference on dataset card metadata, see the spec: https://github.com/huggingface/hub-docs/blob/main/datasetcard.md?plain=1
-# Doc / guide: https://huggingface.co/docs/hub/datasets-cards
-{}
+license: apache-2.0
+library_name: transformers
+pipeline_tag: question-answering
 ---
 
 # CodeI/O: Condensing Reasoning Patterns via Code Input-Output Prediction
 
+This repository contains the model described in the paper [CodeI/O: Condensing Reasoning Patterns via Code Input-Output Prediction](https://huggingface.co/papers/2502.07316).
+
 <p align="left">
     📑 <a href="https://huggingface.co/papers/2502.07316" target="_blank">Paper</a> &nbsp&nbsp | &nbsp&nbsp 🌐 <a href="https://codei-o.github.io/" target="_blank">Project Page</a> &nbsp&nbsp | &nbsp&nbsp 💾 <a href="https://huggingface.co/collections/hkust-nlp/codei-o-67a978e28fd926b56a4f55a2" target="_blank">Released Resources</a> &nbsp&nbsp | &nbsp&nbsp 📦 <a href="https://github.com/hkust-nlp/CodeIO" target="_blank">Repo</a>